Table 2.

Correlation between PIV and clinicopathological features in CRC patients.

Variables	Low PIV (n = 183)	High PIV (n = 183)	p-value
Age (year, $\overline{\mathrm{x}}\pm \mathrm{S}$)	62 ± 11	63 ± 11	0.4558
Gender			0.5955
Male	105	110
Female	78	73
BMI (kg/m2, $\overline{\mathrm{x}}\pm \mathrm{s}$)a	23.5 ± 4.1	23.9 ± 3.4	0.1643
Alb (g/L, $\overline{\mathrm{x}}\pm \mathrm{s}$)	42.3 ± 3.6	41.2 ± 4.3	0.01981
CEA	1.935 (3.300,6.580)	2.435 (4.680,10.255)	0.0006496
CA19-9	3.40 (7.05,15.92)	3.940 (9.140,20.615)	0.1278
CA125b	8.200 (11.300,19.275)	8.200 (11.200,18.800)	0.3022
AFPc	2.076 (2.660,3.763)	1.828 (2.545,3.445)	0.1316
Tumor Location			0.00645
Right	37	60
Left	146	123
Tumor Size	4.003 ± 1.791	5.026 ± 1.923	0.000000002151
Surgical Approachd			0.03429
Open	70	90
Laparoscopy	111	91
Operative Timee	177.547 ± 57.732	179.995 ± 59.988	0.6927
Histological Type			0.1823
Low	19	29
Medium	157	147
High	7	7
T stage			0.00000000000005164
T1	25	3
T2	70	11
T3	86	158
T4	2	11
N stage			0.000002474
N0	150	102
N1	23	53
N2	10	28
M stage			0.06237
M0	172	162
M1	11	21
TNM stage			0.0000000000006989
I	74	6
II	71	83
III	27	73
IV	11	21

^a Missing in 25 case.

^b Missing in 70 case.

^c Missing in 70 case.

^d Missing in 4 case.

^e Missing in 4 case.